Glass-blowing machine



(No Model.)

H. BARI). 4, GLASS BLOWING MACHINE. No. 453,977l Patented June 9,1891.

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i Movey.

' UNITED l STATES vPATENT Ormea.

lI-ARY, iARl),'0F PHILADELPHIA, PENNSYLVANIA.

GLASS-BLOWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 453,977, dated June 9,1891. I Application filed September lI 1890. Serial No. 364,584.- (No model.)

To all whom it may concern.:

Be it knownthat I, HARRY BARD, a citizen of the United States, residing at Philadelphia, in the county of PhiladelphiaJ and State of Pennsylvania, vhave invented certain new and useful Improvements iii Glass-Blowin g Machines, of which the rfollowing-is a specification, reference being had therein to the accompanying drawings.

My. invention relates to improvement-s in glass-'blowing' machines; and it consists in certain novel features which will. be hereinafter pointed out.

The object of my invention is to provide means whereby the article formed in themachine will be thin and have a large capacity; and a further object of my invention is to provide a machine which will be Vsimple in its construction and. which can be operated by an unskilled person. These objects I acceuiplisll by the use ot' the mechanism illust-rated in the accompanying drawings, in which- Figure l is a sectional view of my improved machine, showing the retaining-cylinder within 'the mold, and Fig. 2 is a sectional view, on a reduced scale, of the mold with the cylinder removed.

The base or supporting-lrame A may be of any desired size and of any suitable construction, but preferably consists of an open frame having the platform B at its upper cud, on which the `mold C rests. 'lhe base l) of the mold fits uponzthis platform within the annular fiangeori-'iim E thereof, and set-screws F, mounted in said rim, bear against the base,v so as to secure the mold firmly in its position, as clearly shown. At the center of this platform l is an opening (r,wl 1ich registers with a central openingll inthe base of the mold, and through which the plunger and blow-pipe is passed into themold.l Beloav the platform I. secure the bellows I, the lower end of which is adapted to be moved in a vertical plane by means ofthe treadle J and the link K, connecting the treadle with the bellows. A flexible tube L extends from the upper end of the bellows and serves to connect the same with the blow-pipe or plunger M, which consists ot a hollow cylindrical rod having a closed upper cud and provided nearsaid'end with the diamctrical pcrforations N. The

plunger is 'provided at an intermediate point l and steady current to act on the gift-9,1% while side to the moldl and is provided at a diametrically-opposite point with a handle S and 'a latch 'l to hold it firmly in Vits closed position by engaging the edge of the mold.

U designates the retaining-cylinder, which f is adapted to retainv the molten glass. ina cylindrical 'mass until atter the plunger has been forced thcrcinto, after which it is rc- The mold is proyided"v moved to permit the glass to bc blown against the sides of the mold. 'lhis cylinder is of a less diameter than the mold and is provided at'its upper end with .a handle V, by means of which it may be manipulated. The cylinder is further provided at its upper end with the external annular l'lauge \V, which bears against the mold to held the said cylinder concentrically within the saine.

'lheoperation of my improved machine will, it is thought, be readily understood. The glass is melted in the usual manner, and when it is in condition for blowing the cylinder is placed in the jmold land the molten glass then poured in the cylinder. The glasswill thus'be Akept in a compact mass while the operator manipulates theleverQ to force the plunger up into the same. 'lphe cylinder is then removed and the coy'er or lid swung over the mold and fasteued,"atter which the operator depresses the treadle to compress the bellows and thusV` send .al current of air throughrthe plunger. *This current will cscapev through the perforations in the plunger, and its pressure will force the glass against the interior surface of the mold and cause it to conform to the configuration of the same, thereby producing the desired article.

It w/illbe seen from the foregoing description that my machine is very simple .in -its construction and operation, and its advantages are thought to be obvious. The machine can be` built at alow cost and can bev rcadilyaud easily operated by an unskilled person. 'lhe use of the bellows gives astitll" IOO the lever Qand its connections permit the plunger to be easily forced into the molten glass. The use of the cylinder causes the quantity of molten glass to be of much less volume vthan the mold (so that the article manufactured may be thin andhave a large capacity) and at the same time to be evenly distributed. By the time the plunger has been forced into the molten `glass and the cylinder withdrawn the glass will have become somewhat. chilled and will be in a plastic state, so that 'it will momentarily retain a cylindrical form quite long enough to allow the blowing to be commenced. The glass will then be forced against the sides of the mold and will be evenly distributed and have an equal thickness throughout. By means of cylinders of dierent diameters the thickness of the vessels manufactured can also be regu lated.

`Having thus described my invention what ,i claim, and desire to secure by Letters Patent, is

1. A glass-blowing -apparatus consisting,

essentially, of a mold, a retainingylinder' cylinder through the bottom of the same, as l set forth.

2. In a glass-blowing apparatus, the-eombi-- nation, with the frame, of the mold secured thereon, the combined plunger and blow-pipe, the lever fulcrumed on the frame and connected to the said plunger and blow-pipe, a bellows connected with the blow-pipe, and a treadle for operating said bellows, as' set forth.

AThe combination of the mold, the retaining-cylinder removably held therein, and the hollow plunger adapted to enter the cylinder and the mold through the bottom of the same, said hollow plunger being provided with diametrical perforations near its upper end, sub stantially as set forth.

In testimony whereof I aix my signatu re in the presence of two Witnesses.

HARRY BARI). Witnesses:

JOHN F. HALBACH', HENRY RoCsKCY. 

